Q: When Should I Get a Fuel Injection Flush?

asked by on

When should I get a fuel injection flush?

When you are maintaining your vehicle, it is important to service every component of the engine in order to keep it in great running condition so you do not have future issues. You change your engine oil and transmission fluid, but there seems to be a lot of controversy over flushing your fuel injection system. Some technicians say it’s a waste of money, whereas others see the benefit.

Let me elaborate on this. If the manufacturer of the vehicle states this service should be done, then you should really take precedence of this over what other shops or sources are saying.

There are many benefits to the fuel injection service and we will discuss this in more detail.

The fuel injection service should be done roughly every 30,000 miles or when directed to do so by the manufacturer. To find this out, check your owner’s manual for scheduled maintenance. It will keep any debris that is in the fuel from clogging up the fuel injectors.

Fuel injectors are nothing more than an electrical solenoid that opens and closes in milliseconds controlled by the engine’s computer to allow the fuel to enter the combustion chamber. At the end of the fuel injector there is a small micron screen that helps to atomize the fuel by spraying it in a certain pattern. If this screen gets fully or partially clogged, you would have to replace the fuel injector which is not cheap by any means.

Most technicians will understand that a partially clogged fuel injector is as bad, if not worse, than one that is not working at all. If you have a partially clogged fuel injector, it can cause intermittent issues with the way the vehicles runs, the amount of power on acceleration, and may cause engine lights to turn on. Never mind the fact that if you do not have enough fuel going into one of your cylinders for a period of time, then this could create catastrophic failure inside the engine and melt pistons and or valves from an overheating. This condition is know as "running lean" and is far better to burn top much fuel than not enough.

Not only does fuel burn to produce power, but it also helps to cool down the internal engine temperatures. It also helps to lubricate and stop corrosion. Always consult the manufacturer on when the service should be done, but it also depends on your driving habits. If you do not drive highway speeds or on the interstate, or if the vehicle sits for long periods of time without being driven, these are reasons to do a fuel injection flush sooner due to the possibility of getting deposits in the fuel rails and helping to clog the fuel injectors. If you let your fuel tank go to empty this is also a bad thing for your fuel pump.

Believe it or not, the fuel helps lubricate and cool the fuel pump as well, so try not to drive with under ¼ of a tank as much as possible. The fuel pump needs to stay immersed in fuel to be able to function properly and not overheat. The number one reason for a fuel pump failure is driving with low fuel.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. When Should I Get a Fuel Injection Flush?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car wont start, 2009 Saturn Vue

First, verify the fuel tank is not empty. If you have fuel and the fuel gauge and pump is inoperative, then you may have a bad fuel pump and connector to the fuel pump. If you are still having trouble,...

Q: Q: Injectors are not pulsing

Hello there, many faults will cause the fuel injectors to not pulse in your 1997 Mitsubishi Mirage after removing the indicator and wiper assembly. When issues such as this happen after repairs have been made the first step is to...

Q: My fuel gauge is not working properly.

Typically, an improper fuel level reading can be caused by a faulted fuel level sensor. This component is found inside the fuel tank and is likely part of the fuel pump module. Some manufacturers separate the two and others make...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...